[miraclegrau]

Correct me if I'm wrong (too lazy too look it up) GYT-R is the name of the aftermarket parts made by Yamaha. They have pretty much everything you would need to get every last pony out of your R6. Cams, Exhaust....other stuff. I'm thinking about getting the cams, and I might get the exhaust (Wolf came out with an underseat for the 2003 that I want, too).
All the parts are made by the same people that designed and built the engine, so you would think they would know exactly what would work the best for the most power.
They have all of these parts on the yamaha website.

 

[Jeffsy]

This is the stuff your taling about, I think.

http://www.yamaha-motor.com/accessories/AcSubContainerItems.aspx?lid=1&cid=1&mid=8&connavid=191&conid=5&sconnavid=2031&Year=All

 

[RedlineR6]

FYI, I love my gyt-r full system! Before installing my PC3 i could feel a gain in torque right away. The PC3 cleared up some lean spots and cured the 5000rpm surging. Real smooth. Going to be making a custom map here soon and finally seeing what i can pull out of it. Construction is also alot more quality than in years past. Rivets have been replaced by allen head screws etc.. Real nice. Medium to loud sound, but it's lower toned, and not raspy. Not exactly sure on who produces the pipes for yamaha under the GYT_R name, but have heard rumors of Muzzy, and White Bros.

Also, the full system pictured on the website and in the catalog is not what you get. I wanted to keep my passenger pegs and after doing some research found that Yamaha started to make a mid/high mount design (which is pictured) but never made it for consumer. You get the race headers, and a standard mount can.

 

[03r6sbk]

yec makes awhole kit for the 2003 but i'm too lazy to look it up again but I posted it a while ago maybe its still there